Riding the Nightmare [Dramatized Adaptation]: MacCallister 12

"Duff MacCallister left Scotland to forge a new life in America, raising cattle on the western plains of the growing nation. But keeping his dream alive means facing off against the country's most violent, bloodthirsty men.
The Spencer family is part of a wagon train passing through Chugwater, Wyoming, bound for the valley of Longshot Basin. Unfortunately, the trail that leads there has been buried under an avalanche. The only route the homesteaders can take is the infamous Nightmare Trail-a...